Final answer:
For the sentence 'The book ‘Management Principles’ __________ quite insightful', the correct answer is 'is', because we are stating a fact about the singular subject, 'The book ‘Management Principles’.
Step-by-step explanation:
In the sentence 'The book ‘Management Principles’ __________ quite insightful', the correct answer is 'is'. So, the correct complete sentence would be 'The book ‘Management Principles’ is quite insightful'. In English, when the subject is singular, we need to use 'is' or 'has'. Here, the subject 'The book ‘Management Principles’' is considered singular. However, between 'is' and 'has', 'is' is the most suitable since we are simply stating a descriptive fact about the book rather than indicating possession or action as 'has' would do.
Answer: The book ‘Management Principles’ is quite insightful
Learn more about Subject-Verb Agreement